Remove spammy log message from RtpSenderVideo::AddRtpHeaderExtensions.
Remove spammy log message from RtpSenderVideo::AddRtpHeaderExtensions.

Bug: None
Change-Id: I9522043d29eb131c8b35573eb2eaa9740a5ac439
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128124
Reviewed-by: Sergey Silkin <fc631354f276613a5410ea259cf4618b2846d39b@webrtc.org>
Reviewed-by: Stefan Holmer <eb0877843acc39f8ef6f7269937dee931c372d23@webrtc.org>
Commit-Queue: Philip Eliasson <729b5e2dca9359bca8c81d600ef9d3e554586ac9@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#27163}
TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc